Lubricator.



H. c. WOQDBRIDGE. LUBRIGATOR, APPLIOATION FILED SEPT. 23. 1907.

Will/vitesses i 2. 27%.

' ZZarwggg a discharge opening which engages 1n a lengthwise spline d in the `Wise inthis plunger nearly Sllrtll@ El" LUBRGATOB.

Specification of Lettera Patent.

Patented June 1 6, 1908.

Application filed September 23, 1997. Serial No. 394,011.

To all whom it may concern:

Be it known that l, HOWARD C. WOOD- nnrnen, a citizen of the United States, residing at Salamanca, in the county of Cattaraugus and State of New York, have invented a new vand useful Improvement in Lubricators, of which the following is a specification.

This invention relates more articularly to improvements in force feed llubricators of that sort in which the oil is fed gradually from a reservoir or supply cup by slowly forcing a piston Or plunger into the reservoir or I s owlyturning the plunger can 'be employed.

cup to displace the oil.

The object of the invention is to provide a; hich will be` lubricator of this character W positiveand regular in its feed and in which there will be no waste of lubricant or cessationof feed resulting'from leakage or thestolppage of the feed opening.

ni the accompanying drawings: Figure 1 is a sectional view of a lubricator embodying the invention. Fig. 2 is-a cross section of the same on line 2 2, Fig. 1. Like letters of reference in both figures. A represents or outer' end end, and B a and open at its lower or inner from the cup.

The chamber B has an oening in its top for receiving the open end o; the oil cup, and l) in its bottom which is surrounded by a suitable nipple or coupling b for connecting the feed gine cylinder or other part to be lubricated. The cup A may be secured tO ber by the lugs a and bolts al shown, or in any other desirable manner.

C represents a plunger which fits within the oil cup 'A an is preferably externally screw-threaded. to

engage an internal 'thread on the oil cup. The plunger is positively rotated whereby its screw connection with the cup causes it to gradually enter the cup and displace the oil. The means illustrated for operating the plunger are constructed as follows:

A central bore or opening c extends lengthto its head and is adapted to receive one-end of a shaft l) which is journaled at its op osite end in the bottom of the feed chamber The shaft D is keyed to the plunger by a lateral lug d near its end the plunger is refer to like parts an oil reservoir or cup which1 is preferably inverted and closed at its upper v feed chamber to which the oil" cup is secured and into which the oil is fedY chamber to an en-l the feed cham- 4 lunger. This causes the plunger to turn with the shaft, but permits it to move lengthwise independently of the shaft.

A worm wheel E naled in the feed chamber B. The shaft F extends without the feed chamber and is provided 'at its outer end with a ratchet wheelf which may he driven by any suitable connection (notshown) with a workingpartof the engine or machine to which the lubricator is a plied. Any other suitable mechanism for The' lunger, bemgthus rotated, is screwed inward y in the oil cup, and as the head of closed, the oil in the cup is forced out through the screw threads' between the plunger and the interior Of the oil cup and this is the only'escape for the oil. The amount of oil which is forced from the cup is, ofcourse, dependent' upon the distance which the plunger is advanced therein, and can be regulated by controlling the speed of rotation of he driving member and plunger.

While the plunger shown has a 'screwthreaded connection with the Oil cup which causes it to advance into the cup, it is manifest that a smooth plunger fitting in a smoothA surfaced Vcavity of the oil cup and slowly forced ther-cinto. by any suitable means would likewise displace the oil and cause itto feed from the cup betweenrthe sides of the plunger and the cup without providing any other escape passage for the oil in either the cup or the plunger. f.

Thelubricator is primarily intended for lubricating engine cylinders or otherl parts where the oil must be forced to the part tobe lubricated against an opposing pressure, an the feed chamber is therefore referably provided with a pipe G for a mitting steam thereto at a pressure sufficient to balance the opposing pressure and maintain a constant pressure therein. The pressure in the feed chamber suppo ts the film of oil between'the plunger and the sides of the oil cup and prevents the escape of the same except Where the plunger is positively advanced into the cup to displace the oil. in the feed chamber is not necessary, ever, to prevent he leakage of the oil past the plunger when the latter is stationary, as the-space between the sides of the plunger and the cu is so small that the film of Oil therein wo d-hev supported in the same manis secured to the shaft D- and is engaged by a Wormf on a shaft F joury The steam pressure.

hOW-

" will not be clogged or stopped by particles ofcharge opening between the iger by atmospheric pressure in the feed chamiThe oil cup is imperforate except for the o ening inthe bottom-thereof through which t e plunger passes and which serves also as a disc arge opening for the oil. The plunger issolid and the oil which it displaces in the cup must necessarily passthrough this discup and the plunger. Bythus feeding the oil through the space between the plunger and the oil cup instead ofthrough va restricted feed passalge in the plunger or cup, as is common in lu I'i'cators cf this kind, a passage having extended bounding surfaces is obtained which dirt and other foreign matter which may collect in the oil cup, and the movement of the plunger in the cup tends to dislodge any particles which may enter the passage between the same, so that a more positive and regular feed of the oil is thus secured. All of the oil passing between the plunger and the oil cupV enters the feeding chamber and it is this oil which is' fedlto the cylinder or other part to be lubricated, whereas in devices having a separate feed passage, the oil which may leak between the sides of the plunger and the cup is wasted. ,Thefeed of the oil is thereforeV dependent entirely upon the size Iand speed'of movement of the p unger in the c n constructions in which a separate feed passagel is employed, the oil leaking between the sides of the plunger and the cup is Wasted,

and this notonly reduces the amount of oil actually fed to the part to be lubricated but makeslit impossible to determine what proortion of the lubricant is actually bein fed. .I[)f the feed passage become'sxclogged, the eakage is increased, and while the decreasing uantity of oil in the cup would apparently s ow that the oil is being fed from the lubrigator, this oil would not necessarily pass to the part to be lubricated, a To fLllthe cup it is only necessary Ito remove the same and its plunger from theI feed chamber vand-then unscrew the plunger from through said opening around said l chamber or the cup. After the cu is screwed therein unti the oil begins to exudc, when the cup is inverted and secured in place on the feed chamber with the plunger in engagementwith its operating shaft.

claim as :my invention:

'1. A lubricator comprising an y oil cup which is imperforate except for a plunger opening, a solid plunger entering said cup through said opening, and a screw feed mechanism for forcing said plunger slowly into said cup ,to displace the oil and force it out through saidopening around said, plunger, substantially as set forth.

2. A lubricator comprising a feed chamber or passage, an oil cup which is imperforate except for an opening communicating with said feed chamber or passage, and a solid plunger entering'the opening in said oil cup and adapted to have a movement relative to said cup to displace the oil and force it out plunger,

substantially as set forth. Y

3. A lubricator comprising a feed chamber or passage, an oil cup having an internally threaded opening communicating with said feed chamber, an externally threaded solid plunger for yturning said plunger `to advance the same therein and force the o'il out through said opening around the plunger into said feed chamber or passage, substantially as set forth. l 4. A lubricator comprising an oil cup having a plun er opening therein7 a plunger entering sai cup -todisplace the oil therein, and -a feed passage surrounding' said openworking in said opening, and means is iilled, the plunger cup through said opening and 'adapted to have a movement relative to said ing for receiving the oil which passes throu h the same around said plunger, substantial y as set forth.

' Witness my hand, this 19th day' of Septem-y ber, A1907. v

' HOWARD C. WOODBRIDGE'. Witnesses:

E. C. HARD, 0. B. HoRNBEcx. 

